*** Replication code for "Optimal Path of Orbital Debris". A. Bongers and J. L. Torres (UMA)

Codes for the numerical simulation of the DISE-2024 model are avaiable in GAMS and in MATLAB with CasADi. 

Simulations presented is the paper are obtained with the GAMS code. The mail file for simulating the alternative mitigation policies is DISE_2024_01.gms. This code produces a number of Excel files with the results. These Excel files are read by MATLAB to plot optimal trajectories. This is done with the MATLAB script Figures01.m. 

Other files are: 
	DISE_2024_00.gms: Solves the model for a clean space environment.
	DISE_2024_02.gms: Sensitivity analysis for alternative TFP initial growth rate.
	DISE_2024_03.gms: Sensitivity analysis for alternative pure discount rate.
	DISE_2024-04.gms: Solves the model with decreasing launch costs.
	DISE_2024-05.gms: Solves the model with hyperbolic discounting.

DISE-2024 also can be solved in MATLAB using CasADi (Instalation of CasADi required). The MATLAB files for solving the baseline model are the following:
	dise_ocp.m: Main script file
	ocp.m: Function file
	Space1999: Data and calibration file
	

 